
überzeugt sein von
to be convinced of
To have firm certainty or a strong belief in something or someone.
Ich bin davon überzeugt, dass dies die beste Lösung für das Problem ist.
I am convinced that this is the best solution to the problem.
convinced
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to be convinced of
To have firm certainty or a strong belief in something or someone.
Ich bin davon überzeugt, dass dies die beste Lösung für das Problem ist.
I am convinced that this is the best solution to the problem.

convinced
Describes a person who has a firm ideological, political, or philosophical position and consistently stands by it.
Als überzeugter Pazifist lehnte er jegliche Form von Gewalt ab.
As a convinced pacifist, he rejected every form of violence.
'Überzeugt' (convinced) is the past participle of the verb 'überzeugen' (to convince). It is used as an adjective to describe the state after someone has been convinced.
Nach dem Gespräch war er von der Idee überzeugt.
After the conversation, he was convinced of the idea.
The fixed construction is 'überzeugt sein von' (to be convinced of) plus dative. When a subordinate clause follows, the structure 'davon überzeugt sein, dass ...' (to be convinced that ...) is often used.
Sie ist von der Qualität des Produkts überzeugt.
She is convinced of the quality of the product.
To describe a person with a firm position, 'überzeugt' (convinced) is often combined with a noun that expresses a worldview or role.
Er ist ein überzeugter Vegetarier und isst niemals Fleisch.
He is a convinced vegetarian and never eats meat.
sure / safe
Sicher and überzeugt can both express firm certainty about a statement. Sicher directly describes how certain something is. Überzeugt places greater emphasis on a personal, firmly held attitude toward that statement. Use „sicher“ for the certainty itself and „überzeugt“ when the focus is on your own attitude.

Ich bin von diesem Plan überzeugt, weil er für alle Beteiligten gut funktioniert.
I am convinced of this plan because it works well for everyone involved.
Ich bin sicher, dass der Zug heute pünktlich ankommt.
I am sure that the train will arrive on time today.